Plz i wasn't at school when teached this

the steps for solving an equation are shown above. identify which property was used for each step.

answer: approximately 206 bones

i hope this u out a branlist and a would be greatly appreciated :

the eight graders whould be the answer

step-by-step explanation: could you give me 5 stars

1. a^4+8a^3+24a^2+32a+16

2.y^8+8y^7+28y^6+56y^5+70y^4+56y^3+28y^2+8y+1

3.x^6-3x^4y^2+3x^2y^4-y^6